package szhn.exception;

import javax.servlet.http.HttpServletRequest;

import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

import lombok.extern.slf4j.Slf4j;
import szhn.model.ResultModel;

@ControllerAdvice
@Slf4j
public class GlobalExceptionHandler {

	/**
	 * 处理自定义的业务异常
	 * 
	 * @param req
	 * @param e
	 * @return
	 */
	@ExceptionHandler(value = BizException.class)
	@ResponseBody
	public ResponseEntity<ResultModel> bizExceptionHandler(HttpServletRequest req, BizException e) {
		log.error("发生业务异常！原因是：{}", e.getErrorMsg());
		
		return ResponseEntity.ok(ResultModel.error(e.getErrorMsg()));
	}

	/**
	 * 处理空指针的异常
	 * 
	 * @param req
	 * @param e
	 * @return
	 */
	@ExceptionHandler(value = NullPointerException.class)
	@ResponseBody
	public ResponseEntity<ResultModel> exceptionHandler(HttpServletRequest req, NullPointerException e) {
		log.error("发生空指针异常！原因是:", e);
		return ResponseEntity.ok(ResultModel.error(e.getMessage()));
	}

	/**
	 * 处理其他异常
	 * 
	 * @param req
	 * @param e
	 * @return
	 */
	@ExceptionHandler(value = Exception.class)
	@ResponseBody
	public ResponseEntity<ResultModel> exceptionHandler(HttpServletRequest req, Exception e) {
		log.error("未知异常！原因是:", e);
		return ResponseEntity.ok(ResultModel.error(e.getMessage()));
	}
}